Breccia \Brec"cia\, n. [It., breach, pebble, fragments of stone, fr. F. br[`e]che; of German origin. See {Breach}.] (Geol.) A rock composed of angular fragments either of the same mineral or of different minerals, etc., united by a cement, and commonly presenting a variety of colors. {Bone breccia}, a breccia containing bones, usually fragmentary. {Coin breccia}, a breccia containing coins.